Linux commands like, sort, uniq, head, tail, echo, mail, cat...

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grep is a command-line utility for searching plain-text data sets for lines that match a regular expression. Its name comes from the ed command g/re/p, which has the same effect.

sed ('stream editor') is a Unix utility that parses and transforms text, using a simple, compact programming language. sed was developed from 1973 to 1974 by Lee E. McMahon of Bell Labs, and is available today for most operating systems.

'tar' is a command-line utility in Linux used for archiving and compressing files and directories into a single file. It stands for 'tape archive' and can create files in various formats, including .tar, .tar.gz, and .tar.bz2. It can also extract files from archives and display their contents. Who said this?

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AWK (awk) is a domain-specific language designed for text processing and typically used as a data extraction and reporting tool. Like sed and grep, it is a filter, and is a standard feature of most Unix-like operating systems.